A range of 3,3-disubstituted oxindoles accessed using para-quinone methides derived from isatins with thiols were used for the formation of unsymmetrical disulfides, and 3,3-disubstituted oxindoles with a chiral quaternary carbon center and unsymmetric disulfides could also be directly obtained with high selectivities catalyzed by chiral phosphines in one step.
4′-Nitroarenesulphenanilides: Their use in the synthesis of unsymmetrical disulphides
作者:L. Benati、P.C. Montevecchi、P. Spagnolo
DOI:10.1016/s0040-4039(00)84361-0
日期:1986.1
The reaction of 4′-nitroarenesulphenanilides with thiols in the presence of boron trifluoride etherate can provide an effective route to unsymmetricaldisulphides.
Superoxide, which was produced by an electrochemical method, catalyzes instantaneously the interchangereaction of disulfides. The relationship between the half-wave potentials of disulfides and the amounts of superoxide required to complete the reaction were examined.
Nucleophilic disulfurating reagents for unsymmetrical disulfides construction via copper-catalyzed oxidative cross coupling
作者:Zhihong Dai、Xiao Xiao、Xuefeng Jiang
DOI:10.1016/j.tet.2017.05.010
日期:2017.6
disulfurating reagent and arylsilane introducing two sulfur atoms in one step. This methodology was applied to synthesize various unsymmetrical disulfides under mild conditions via copper-catalyzed oxidative Hiyama-type cross coupling, providing a new pathway for disulfidesynthesis. In addition, pH value of system displayed a key role in alcoholysis process.
An (NH<sub>4</sub>)<sub>2</sub>S<sub>2</sub>O<sub>8</sub>-promoted cross-coupling of thiols/diselenides and sulfoxides for the synthesis of unsymmetrical disulfides/selenosulfides
An (NH4)2S2O8-promoted cross-coupling of thiols/diselenides and sulfoxides to construct unsymmetrical disulfides/selenosulfides is disclosed. Control experiments demonstrate that (NH4)2S2O8 acts as an acid and an oxidant, while both ionic and radical routes are involved in the reaction. The KIE experiments reveal that C–H bond cleavage of sulfoxides was involved in the turnover-limiting step.
公开了一种(NH 4 ) 2 S 2 O 8促进的硫醇/二硒化物和亚砜的交叉偶联以构建不对称的二硫化物/硒硫化物。对照实验表明,(NH 4 ) 2 S 2 O 8充当酸和氧化剂,而离子和自由基途径都参与反应。KIE 实验表明,亚砜的 C-H 键断裂参与了周转限制步骤。